Treatment response, as determined by axial T1-weighted contrast-enhanced MRI, in a 12-year-old patient with NPC coexisting with hypertrophic adenoids. A, before treatment, hypertrophic adenoids (short arrow) were invaded by the tumor, which originated from the right pharyngeal recess. The bright stripe in hypertrophic adenoids was interrupted (long arrow). Hypertrophic adenoid extension into the left pharyngeal recesses is also detected (thin long arrow). B, 3 months after the end of chemoradiotherapy, a CR was achieved for the tumor, and a PR was demonstrated for hypertrophic adenoids (short arrow). Note that the previously invaded stripes retained their hypo-intensity (long arrow). C, 6 months after the end of chemoradiotherapy (without further treatment), no tumor recurrence was identified, and hypertrophic adenoids became smaller (short arrow).